A090220 - OEIS

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A090220 as a simple table

`n`		`a(n)`
`1`		`1`
`2`		`1`
`3`		`1`
`4`		`1`
`5`		`2`
`6`		`10`
`7`		`20`
`8`		`70`
`9`		`560`
`10`		`1680`
`11`		`2800`
`12`		`30800`
`13`		`369600`
`14`		`800800`
`15`		`11211200`
`16`		`168168000`
`17`		`448448000`
`18`		`7623616000`
`19`		`137225088000`
`20`		`434546112000`
`21`		`8690922240000`
`22`		`182509367040000`
`23`		`669201012480000`
`24`		`15391623287040000`
`25`		`369398958888960000`

[1,1,1,1,2,10,20,70,560,1680,2800,30800,369600, 800800,11211200,168168000,448448000,7623616000, 137225088000,434546112000,8690922240000, 182509367040000,669201012480000,15391623287040000, 369398958888960000]

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Last modified May 4 18:21 EDT 2024. Contains 372257 sequences. (Running on oeis4.)